The one and only Tim Cain did a presentation at the 2012 Game Developers Conference about the three-year development cycle on the original Fallout (starting in 1994), covering such topics as their initial plans to base it on the GURPS system, the crazy 14-hour days they worked during its crunch cycle, why they chose a post-nuclear theme, how they arrived at the title of "Fallout", how the idea of "talking heads" came to fruition, and much more. It's a full hour-long presentation, and well worth your time: